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Finding the Third Proportional to 543,140 and 821,699

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Solution

The third proportional to 543,140 and 821,699 is: 1,243,121.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,140 : 821,699 = 821,699 : x
  2. Step 2: Convert to fraction form
    543,140/821,699 = 821,699/x
  3. Step 3: Cross multiply
    543,140x = 821,699 × 821,699
  4. Step 4: Simplify right side
    543,140x = 675,189,246,601
  5. Step 5: Solve for x
    x = 675,189,246,601/543,140
  6. Step 6: Final answer
    x = 1,243,121.93

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.